<template>
  <view>
	  <!-- 使用自定义的搜索组件 -->
	  <my-search  @myclick="gotoSearch"></my-search> 
    <view class="scroll-view-container">
      <!-- 左侧的滚动视图区域 -->
      <scroll-view class="left-scroll-view" scroll-y :style="{height: wh + 'px'}">
		<block v-for="(item,i) in cateList" :key='i'>
			
			 <view :class="['left-scroll-view-item',i === active ? 'active': '']" 
			 @click="activeChanged(i)">{{item.cat_name}}</view>
		</block>
        
      </scroll-view>
      <!-- 右侧的滚动视图区域 -->
      <scroll-view :scroll-top="scrollTop" class="right-scroll-view" scroll-y :style="{height: wh + 'px'}">
        <view class="cate-lv2" v-for="(item2, i2) in cateListLeve2" :key="i2">
          <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
		  <view class="cate-lv3-list">
		        <!-- 三级分类 Item 项 -->
		        <view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3"
				@click="gotoGoodsList(item3)">
		          <!-- 图片 -->
		          <image :src="item3.cat_icon"></image>
		          <!-- 文本 -->
		          <text>{{item3.cat_name}}</text>
		        </view>
		  </view>
        </view>
		
      </scroll-view>
    </view>
  </view>
</template>

<script>
  import badgeMix from "@/mixins/tabbar-badge.js"
  export default {
	mixins: [badgeMix],
    data() {
      return {
        // 窗口的可用高度 = 屏幕高度 - navigationBar高度 - tabBar 高度
        wh: 0,
		// 分类数据列表
		cateList: [],
		// 初始选中
		active: 0,
		// 二级列表数据
		cateListLeve2: [1,2],
		// 滚动条距离顶部的距离
		scrollTop: 0
      };
    },
    onLoad() {
      // 获取当前系统的信息
      const sysInfo = uni.getSystemInfoSync()
      // 为 wh 窗口可用高度动态赋值
      this.wh = sysInfo.windowHeight
	  // 获取分页数据列表
	  this.getcateList()
	  console.log(this.cateListLeve2)
    },
	methods:{
		getcateList: async function(){
						const { data: res } = await uni.$http.get('/api/public/v1/categories')
						// 判断是否获取失败
						if (res.meta.status !== 200) return uni.$showMsg()
						// 转存数据
						this.cateList = res.message
						// 为二级分类赋值
						console.log(this.cateListLeve2)
						console.log(res.message[0].children)
						this.cateListLeve2 = res.message[0].children
		},
		activeChanged: function(i){
			this.active = i;
			// 为二级分类列表重新赋值
			this.cateListLeve2 = this.cateList[i].children
			this.scrollTop = this.scrollTop === 0 ? 1 : 0;
		},
		gotoGoodsList: function(item){
			console.log('nihao')
			uni.navigateTo({
				url:'/subpkg/goods_list/goods_list?cid=' + item.cat_id
			})
		},
		// 点击搜索组件
		gotoSearch: function(){
			console.log('ok')
			uni.navigateTo({
				url:'/subpkg/search/search'
			})
		},
		
	}
  }
</script>

<style lang="scss">
	.scroll-view-container {
	  display: flex;
	
	  .left-scroll-view {
	    width: 120px;
	
	    .left-scroll-view-item {
	      line-height: 60px;
	      background-color: #f7f7f7;
	      text-align: center;
	      font-size: 12px;
	
	      // 激活项的样式
	      &.active {
	        background-color: #ffffff;
	        position: relative;
	
	        // 渲染激活项左侧的红色指示边线
	        &::before {
	          content: ' ';
	          display: block;
	          width: 3px;
	          height: 30px;
	          background-color: #c00000;
	          position: absolute;
	          left: 0;
	          top: 50%;
	          transform: translateY(-50%);
	        }
	      }
	    }
	  }
	}
	.cate-lv2-title {
	  font-size: 12px;
	  font-weight: bold;
	  text-align: center;
	  padding: 15px 0;
	}
	.cate-lv3-list {
	  display: flex;
	  flex-wrap: wrap;
	
	  .cate-lv3-item {
	    width: 33.33%;
	    margin-bottom: 10px;
	    display: flex;
	    flex-direction: column;
	    align-items: center;
	
	    image {
	      width: 60px;
	      height: 60px;
	    }
	
	    text {
	      font-size: 12px;
	    }
	  }
	}
</style>
